Template lint instructions (#1932)

* cache __TYPE_MAP and init submodules

* correct linting instructions in pull request template

.github/PULL_REQUEST_TEMPLATE.md

@@ -12,6 +12,6 @@ Show how to reproduce the new behavior (can be a bug fix or a new feature)
 - [ ] Did you update CHANGELOG.md with your changes?
 - [ ] Have you checked our [Contributing](https://github.com/NeurodataWithoutBorders/pynwb/blob/dev/docs/CONTRIBUTING.rst) document?
 - [ ] Have you ensured the PR clearly describes the problem and the solution?
-- [ ] Is your contribution compliant with our coding style? This can be checked running `flake8` from the source directory.
+- [ ] Is your contribution compliant with our coding style? This can be checked running `ruff check . && codespell` from the source directory.
 - [ ] Have you checked to ensure that there aren't other open [Pull Requests](https://github.com/NeurodataWithoutBorders/pynwb/pulls) for the same change?
 - [ ] Have you included the relevant issue number using "Fix #XXX" notation where XXX is the issue number? By including "Fix #XXX" you allow GitHub to close issue #XXX when the PR is merged.